For windows, I use Gila Heat-Control Light film. It's available at home depot and lowes. It provides a good balance of rf reflectivity while still letting a lot of light in. After I put it on at home, people couldn't really notice I had put up window film. I like this solution because it is DIY and cheaper than some other alternatives. Note the Platinum version probably provides more protection but it's more obvious since it is darker in color. In general, if it reflects heat (Infrared), it's likely to also reflect RF. Amy --- In [hidden email], "Bill Bruno" <wbruno@...> wrote: > > In my experience metal flyscreen works well *if* it is not weathered. > The crossing wires need to make electrical contact with eachother. > On casement-style windows the screen is inside, not exposed to > weather when the window is closed, and likely to work well. > > Low-E glass is apt to shield some, but the low-E glass on my house > does not do much. Some metal tint (50% reflective) shield very well, while > others do not > (in the case of Scotchtint, 'amber metallic' shields well, but silver does > not). > > Bill > > On 6/26/07, canaryyuk <asurisuk@...> wrote: > > > > my dad has got bog standard double glazed windows in his bedroom, > > which appears to screen out the rays from nearby mast. > > > > --- In [hidden email] <eSens%40yahoogroups.com>, "charles" > > <charles@> wrote: > > > > > > Hello Ian, > > > > > > I must correct you here. > > > > > > Glass windows may have an enormous shielding capacity. > > > I see that daily while measuring. > > > But of course I am speaking about what we call HR++ glass, > > a very > > > thermal insulating glass. > > > The stone walls shield less than those window panes. > > > > > > It is difficult to say where *hotspots* originate from. > > > They are small concentrations of high frequencies. > > > I measure them as some balls (bigger than a tennis ball, but > > smaller than a > > > football). > > > I use a special meter with a magnetic antenna. > > > I usually measure the *sitting positions* in living rooms, and > > the > > > beds. > > > > > > It is so possible to determine where people have trouble in their > > head, or > > > their chest, or their abdomen, or legs. > > > > > > > > > Greetings, > > > Charles Claessens > > > member Verband Baubiologie > > > www.milieuziektes.nl > > > www.milieuziektes.be > > > www.hetbitje.nl > > > checked by Norton Antivirus > > > > > > > > > ----- Original Message ----- > > > From: "Ian Kemp" <ianandsue.kemp@> > > > To: <[hidden email] <eSens%40yahoogroups.com>> > > > Sent: Monday, June 25, 2007 21:58 > > > Subject: RE: [eSens] Re: Trees and water - I need some input and > > suggestions > > > > > > > > > > Basically, trees, lakes and anything with water in are good > > absorbers of > > > > microwaves (and turn them into a small amount of thermal > > But a > > > > proportion of waves can "leak" or "bend" round the side of trees, > > and also > > > > unless the leaf cover is very thick, some waves can penetrate. > > Deep > > > > inside > > > > a forest one is probably OK, but although a single line of garden > > trees > > > > helps, it's not perfect. In my Dad's back garden we noticed a > > significant > > > > difference in the signal between summer and winter when the trees > > had lost > > > > their leaves. > > > > > > > > One interesting "angle" is that we all of course absorb microwaves > > > > ourselves, being about 80% water. So if Sue and I are walking > > near a > > > > mast, > > > > I can walk on the mast side of her as a "human shield"! It does > > make some > > > > difference - the electrosmog detector shows the signal is > > significantly > > > > less > > > > where my body blocks it, but the effect only lasts for a couple > > of feet. > > > > (But we don't mind walking that close together!) > > > > > > > > But basically, as has been said, the biggest single difference > > comes from > > > > shielding windows, using the standard metallic gauze netting. > > Glass > > > > windows > > > > have virtually no blocking power (no water in them) whereas > > external walls > > > > are pretty good. However we've also seen "hot spots" inside a > > room where > > > > the beam was coming through a window in another room and then > > through a > > > > thin > > > > internal wall; or where it was coming down through the roof > > (where > > > > there are only tiles or thin walls in the way of the beam). > > > > > > > > Ian > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > |
In reply to this post by asurisuk
... For windows, I use Gila Heat-Control Light film. It's available at
home depot and lowes.... Hi Amy, We tested this product some time ago and found that it offers little or no RF shielding. Emil |
I just tried a test on Gila Platinum (I don't have their Light).
It is certainly more than 10dB for a 2.4 GHz field, which means 20+dB in terms of shielding power (and could be much higher given the crudeness of my measurement). I do believe that there are better products (I have ScotchTint on my car, 30+dB, which Emil sells, but only by the whole roll), but I agree with Amy's logic: cheap, available, can install yourself, and if it blocks IR it is likely to block microwaves. It's also interesting that ScotchTint silver (if you look at the specs) does not shield much (7db or something IIRC), but amber metallic is excellent. So there is precedent for different flavors from the same manufacturer (platinum vs light) having different shielding properties. I can recommend the Gila Platinum, especially in a sunny climate. In a cloudy climate one might miss the brightness of a regular window if it's a room used in daytime. Also, one should be aware that a DIY installation will not be perfect, although I stopped noticing the imperfections after the first couple days. Bill On 7/5/07, Emil DeToffol <[hidden email]> wrote: > > ... For windows, I use Gila Heat-Control Light film. It's available at > home depot and lowes.... > > Hi Amy, > > We tested this product some time ago and found that it offers little or no > RF shielding. > > Emil > > > [Non-text portions of this message have been removed] |
Free forum by Nabble | Edit this page |